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City ZIP codes · California

El Cajon, CA ZIP Codes

4 ZIP codes use the postal name El Cajon, California (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 3 residential and 1 for PO boxes or a single organization. Median household income runs from $74,013 in 92021 to $101,973 in 92019, 1.4 times as much (Census Bureau, ACS 2020-2024). El Cajon's most populous ZIP code is 92021, with 70,501 people (ACS 2020-2024); 11% of its land is in the city of El Cajon.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are El Cajon's ZIP codes?

92019: $102k median household income92020: $76k median household income92021: $74k median household income92019920219202092019: $102k median household income92020: $76k median household income92021: $74k median household income92019920219202092019: $102k median household income92020: $76k median household income92021: $74k median household income920199202192020
The 3 residential ZIP codes named El Cajon, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are El Cajon's ZIP codes?

The highest median household income is in 92019 ($101,973), the lowest in 92021 ($74,013). Home values run from $611,900 in 92021 to $813,100 in 92020.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 3 residential ZIP codes of El Cajon

Residential ZIP codes with the postal name El Cajon, CA, largest first (ACS 2020-2024); sort by any column
County
92021 San Diego County 70,501 2,514 $74k $612k
92020 San Diego County 57,842 5,203 $76k $813k
92019 San Diego County 45,351 1,429 $102k $801k

Download the 4 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

PO Box and single-organization ZIP codes in El Cajon

1 ZIP code named El Cajon has no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.

El Cajon, CA: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
92022San Diego County

Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.

Which counties do El Cajon's ZIP codes reach?

El Cajon's residential ZIP codes lie in San Diego County.

Which places do El Cajon's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, El Cajon's residential ZIP codes cover El Cajon itself and 6 other places, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

  • Crest census-designated 92019, 92021
  • Harbison Canyon census-designated 92019, 92021
  • Bostonia census-designated 92021
  • Casa de Oro-Mount Helix census-designated 92020
  • Granite Hills census-designated 92019
  • Rancho San Diego census-designated 92019

Source: U.S. Census Bureau, 2020 ZCTA-to-place relationship file (shares of land).

Which first three digits do El Cajon's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of El Cajon starts with 920.

Three-digit prefixes of El Cajon's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are El Cajon's
PrefixSectional centerHereAll codes
920 San Diego, CA (SCF 920) 4 64

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.